str = '张三'
str1 = "zhangsan"
str2 = """eifjifg
rgrgrrg"""
print(str)
print(str1)
print(str2)
print('hello\'world')
print('123---{0}---{1}'.format(4,5))
str3 ='4'
print(f'123---{str3}')


for i in range(0,101,2):
    print('开始下载')
    if i==100:
        print('下载完成')
    else:
        str4 ="*"*(i//2)+"."*((100-i)//2)
        print(f'{i}%[{str4}]')










